Put exceptions in a dedicated module to avoid circular imports

fastapi_users/exceptions.py

@@ -0,0 +1,38 @@
+from typing import Any
+
+
+class FastAPIUsersException(Exception):
+    pass
+
+
+class InvalidID(FastAPIUsersException):
+    pass
+
+
+class UserAlreadyExists(FastAPIUsersException):
+    pass
+
+
+class UserNotExists(FastAPIUsersException):
+    pass
+
+
+class UserInactive(FastAPIUsersException):
+    pass
+
+
+class UserAlreadyVerified(FastAPIUsersException):
+    pass
+
+
+class InvalidVerifyToken(FastAPIUsersException):
+    pass
+
+
+class InvalidResetPasswordToken(FastAPIUsersException):
+    pass
+
+
+class InvalidPasswordException(FastAPIUsersException):
+    def __init__(self, reason: Any) -> None:
+        self.reason = reason