refactor: update OAuth token handling to use expires_in instead of ex…

backend/airweave/core/source_connection_service.py

@@ -923,8 +923,8 @@ async def _create_with_oauth_token(
             "refresh_token": obj_in.authentication.refresh_token,
             "token_type": "Bearer",
         }
-        if obj_in.authentication.expires_at:
-            oauth_creds["expires_at"] = obj_in.authentication.expires_at.isoformat()
+        if obj_in.authentication.expires_in:
+            oauth_creds["expires_in"] = obj_in.authentication.expires_in
 
         # Validate config
         validated_config = await self._validate_config_fields(

backend/airweave/schemas/source_connection.py

@@ -71,13 +71,15 @@ class OAuthTokenAuthentication(BaseModel):
 
     access_token: str = Field(..., description="OAuth access token")
     refresh_token: Optional[str] = Field(None, description="OAuth refresh token")
-    expires_at: Optional[datetime] = Field(None, description="Token expiry time")
+    expires_in: Optional[int] = Field(
+        None, description="Token expiry time in seconds (standard OAuth2 format)"
+    )
 
     @model_validator(mode="after")
     def validate_token(self):
-        """Validate token is not expired."""
-        if self.expires_at and self.expires_at < datetime.utcnow():
-            raise ValueError("Token has already expired")
+        """Validate expires_in is positive if provided."""
+        if self.expires_in is not None and self.expires_in <= 0:
+            raise ValueError("expires_in must be positive")
         return self
 
 

fern/definition/openapi.json

@@ -4575,18 +4575,17 @@
             "title": "Refresh Token",
             "description": "OAuth refresh token"
           },
-          "expires_at": {
+          "expires_in": {
             "anyOf": [
               {
-                "type": "string",
-                "format": "date-time"
+                "type": "integer"
               },
               {
                 "type": "null"
               }
             ],
-            "title": "Expires At",
-            "description": "Token expiry time"
+            "title": "Expires In",
+            "description": "Token expiry time in seconds (standard OAuth2 format)"
           }
         },
         "type": "object",
@@ -8381,4 +8380,4 @@
       "optional": true
     }
   ]
-}
+}