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It resolves the session, calls ",[454,624,459],{},", captures timing into ",[454,627,628],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[631,632,274],"h2",{"id":633},"options",[451,635,636,637,644],{},"Inherits all ",[638,639,641,643],"a",{"href":640},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[454,642,459],{}," options",", plus:",[646,647,648,667],"table",{},[649,650,651],"thead",{},[652,653,654,658,661,664],"tr",{},[655,656,657],"th",{},"Option",[655,659,660],{},"Type",[655,662,663],{},"Default",[655,665,666],{},"Description",[668,669,670,691,710,729],"tbody",{},[652,671,672,678,683,688],{},[673,674,675],"td",{},[454,676,677],{},"exclude",[673,679,680],{},[454,681,682],{},"string[]",[673,684,685],{},[454,686,687],{},"['\u002Fapi\u002Fauth\u002F**']",[673,689,690],{},"Route patterns to skip (glob).",[652,692,693,698,702,707],{},[673,694,695],{},[454,696,697],{},"include",[673,699,700],{},[454,701,682],{},[673,703,704],{},[454,705,706],{},"undefined",[673,708,709],{},"If set, only matching routes are resolved.",[652,711,712,717,722,726],{},[673,713,714],{},[454,715,716],{},"onIdentify",[673,718,719],{},[454,720,721],{},"(log, session) => void",[673,723,724],{},[454,725,706],{},[673,727,728],{},"Called after successful identification.",[652,730,731,736,741,745],{},[673,732,733],{},[454,734,735],{},"onAnonymous",[673,737,738],{},[454,739,740],{},"(log) => void",[673,742,743],{},[454,744,706],{},[673,746,747],{},"Called when no session is found.",[631,749,751],{"id":750},"route-filtering","Route Filtering",[451,753,754],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[462,756,758],{"className":464,"code":757,"language":467,"meta":468,"style":468},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[454,759,760,776,785,800,813,827,834],{"__ignoreMap":468},[472,761,762,764,766,768,770,772,774],{"class":474,"line":475},[472,763,517],{"class":516},[472,765,520],{"class":486},[472,767,523],{"class":482},[472,769,487],{"class":526},[472,771,529],{"class":486},[472,773,532],{"class":482},[472,775,535],{"class":482},[472,777,778,780,782],{"class":474,"line":506},[472,779,542],{"class":541},[472,781,545],{"class":482},[472,783,784],{"class":486}," [\n",[472,786,787,790,792,794,796],{"class":474,"line":513},[472,788,789],{"class":482},"    '",[472,791,554],{"class":499},[472,793,551],{"class":482},[472,795,532],{"class":482},[472,797,799],{"class":798},"sHwdD","     \u002F\u002F Better Auth itself\n",[472,801,802,804,806,808,810],{"class":474,"line":538},[472,803,789],{"class":482},[472,805,563],{"class":499},[472,807,551],{"class":482},[472,809,532],{"class":482},[472,811,812],{"class":798},"   \u002F\u002F Public endpoints\n",[472,814,815,817,820,822,824],{"class":474,"line":574},[472,816,789],{"class":482},[472,818,819],{"class":499},"\u002Fapi\u002Fhealth",[472,821,551],{"class":482},[472,823,532],{"class":482},[472,825,826],{"class":798},"      \u002F\u002F Health checks\n",[472,828,829,832],{"class":474,"line":595},[472,830,831],{"class":486},"  ]",[472,833,571],{"class":482},[472,835,836,838],{"class":474,"line":609},[472,837,612],{"class":482},[472,839,615],{"class":486},[451,841,842],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[462,844,846],{"className":464,"code":845,"language":467,"meta":468,"style":468},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[454,847,848,864,892],{"__ignoreMap":468},[472,849,850,852,854,856,858,860,862],{"class":474,"line":475},[472,851,517],{"class":516},[472,853,520],{"class":486},[472,855,523],{"class":482},[472,857,487],{"class":526},[472,859,529],{"class":486},[472,861,532],{"class":482},[472,863,535],{"class":482},[472,865,866,868,870,872,874,877,879,881,883,886,888,890],{"class":474,"line":506},[472,867,577],{"class":541},[472,869,545],{"class":482},[472,871,548],{"class":486},[472,873,551],{"class":482},[472,875,876],{"class":499},"\u002Fapi\u002Fdashboard\u002F**",[472,878,551],{"class":482},[472,880,532],{"class":482},[472,882,496],{"class":482},[472,884,885],{"class":499},"\u002Fapi\u002Faccount\u002F**",[472,887,551],{"class":482},[472,889,568],{"class":486},[472,891,571],{"class":482},[472,893,894,896],{"class":474,"line":513},[472,895,612],{"class":482},[472,897,615],{"class":486},[451,899,900,902,903,905,906,909,910,913,914,916,917,919],{},[454,901,697],{}," and ",[454,904,677],{}," use glob patterns (",[454,907,908],{},"*",", ",[454,911,912],{},"**","). Provide both if you need granular control — ",[454,915,677],{}," wins over ",[454,918,697],{},".",[631,921,923],{"id":922},"lifecycle-hooks","Lifecycle Hooks",[451,925,926,927,929],{},"Use ",[454,928,716],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[462,931,933],{"className":464,"code":932,"filename":466,"language":467,"meta":468,"style":468},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[454,934,935,951,978,1014,1041,1046,1051,1068,1093,1098],{"__ignoreMap":468},[472,936,937,939,941,943,945,947,949],{"class":474,"line":475},[472,938,517],{"class":516},[472,940,520],{"class":486},[472,942,523],{"class":482},[472,944,487],{"class":526},[472,946,529],{"class":486},[472,948,532],{"class":482},[472,950,535],{"class":482},[472,952,953,956,958,961,965,967,970,973,976],{"class":474,"line":506},[472,954,955],{"class":526},"  onIdentify",[472,957,545],{"class":482},[472,959,960],{"class":482}," (",[472,962,964],{"class":963},"sHdIc","log",[472,966,532],{"class":482},[472,968,969],{"class":963}," session",[472,971,972],{"class":482},")",[472,974,975],{"class":516}," =>",[472,977,535],{"class":482},[472,979,980,983,985,988,990,993,995,998,1001,1003,1006,1008,1011],{"class":474,"line":513},[472,981,982],{"class":478},"    if",[472,984,960],{"class":541},[472,986,987],{"class":486},"session",[472,989,919],{"class":482},[472,991,992],{"class":486},"user",[472,994,919],{"class":482},[472,996,997],{"class":486},"plan",[472,999,1000],{"class":482}," ===",[472,1002,496],{"class":482},[472,1004,1005],{"class":499},"enterprise",[472,1007,551],{"class":482},[472,1009,1010],{"class":541},") ",[472,1012,1013],{"class":482},"{\n",[472,1015,1016,1019,1021,1024,1027,1030,1033,1035,1037,1039],{"class":474,"line":538},[472,1017,1018],{"class":486},"      log",[472,1020,919],{"class":482},[472,1022,1023],{"class":526},"set",[472,1025,1026],{"class":541},"(",[472,1028,1029],{"class":482},"{",[472,1031,1032],{"class":541}," _forceKeep",[472,1034,545],{"class":482},[472,1036,604],{"class":603},[472,1038,490],{"class":482},[472,1040,615],{"class":541},[472,1042,1043],{"class":474,"line":574},[472,1044,1045],{"class":482},"    }\n",[472,1047,1048],{"class":474,"line":595},[472,1049,1050],{"class":482},"  },\n",[472,1052,1053,1056,1058,1060,1062,1064,1066],{"class":474,"line":609},[472,1054,1055],{"class":526},"  onAnonymous",[472,1057,545],{"class":482},[472,1059,960],{"class":482},[472,1061,964],{"class":963},[472,1063,972],{"class":482},[472,1065,975],{"class":516},[472,1067,535],{"class":482},[472,1069,1071,1074,1076,1078,1080,1082,1085,1087,1089,1091],{"class":474,"line":1070},8,[472,1072,1073],{"class":486},"    log",[472,1075,919],{"class":482},[472,1077,1023],{"class":526},[472,1079,1026],{"class":541},[472,1081,1029],{"class":482},[472,1083,1084],{"class":541}," anonymous",[472,1086,545],{"class":482},[472,1088,604],{"class":603},[472,1090,490],{"class":482},[472,1092,615],{"class":541},[472,1094,1096],{"class":474,"line":1095},9,[472,1097,1050],{"class":482},[472,1099,1101,1103],{"class":474,"line":1100},10,[472,1102,612],{"class":482},[472,1104,615],{"class":486},[451,1106,1107,1108,1110,1111,1113,1114,1116],{},"Hooks fire after the session is resolved and ",[454,1109,459],{}," has set its fields. They run on every request that passes the ",[454,1112,697],{},"\u002F",[454,1115,677],{}," filter, so keep them fast and side-effect-free.",[1118,1119,1120,1125],"tip",{},[451,1121,1122,1123,545],{},"Common patterns for ",[454,1124,716],{},[1126,1127,1128,1132,1135],"ul",{},[1129,1130,1131],"li",{},"Force-keep audit logs for admins or high-value plans.",[1129,1133,1134],{},"Tag the request with feature flags or tenant info loaded from the session.",[1129,1136,1137],{},"Increment a per-user counter for billing.",[631,1139,1141],{"id":1140},"error-handling","Error Handling",[451,1143,1144,1145,1148,1149,902,1151,1154],{},"The middleware catches every error from ",[454,1146,1147],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[454,1150,628],{},[454,1152,1153],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1156,1157,1158],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":468,"searchDepth":506,"depth":506,"links":1160},[1161,1162,1163,1164],{"id":633,"depth":506,"text":274},{"id":750,"depth":506,"text":751},{"id":922,"depth":506,"text":923},{"id":1140,"depth":506,"text":1141},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1168,1171],{"label":298,"icon":301,"to":299,"color":1169,"variant":1170},"neutral","subtle",{"label":312,"icon":315,"to":313,"color":1169,"variant":1170},{},{"title":303,"icon":306},{"title":446,"description":1165},"Ft-jGRp0Xs3NjYmYAXhrK-z4jsNG1S1GJbOMZWpMh0E",[1177,1179],{"title":298,"path":299,"stem":300,"description":1178,"icon":301,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":308,"path":309,"stem":310,"description":1180,"icon":258,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1782925725379]