Login With Connect Interface failed when it's player first login

[wakuyaku]

[2025.08.12-13.57.41:295][492]LogEIKSDK: Warning: LogEOS: Error response received from backend. ServiceName=[EOSAuth], OperationName=[TokenGrant], Url=[], HttpStatus=[404], ErrorCode=[errors.com.epicgames.eos.auth.user_not_found], NumericErrorCode=[110016], ErrorMessage=[EOS User Identity not found. identityProviderId: steam accountId: 765611982890*******], CorrId=[EOS-Zm2uA83mV0W6oFduSpgXGA-hqA0uzsTf0O-Bhad****nQ]

[2025.08.12-13.57.41:327][494]LogEIK: LoginViaConnectInterfaceCallback called. ResultCode: EOS_InvalidUser

when steam player first login to my game，Login With Connect Interface would return with error，EOS_InvalidUser.

from Epic docs: Connect Interface

Creating a new user
Creating a user will generate a new Product User ID for the user given the external credentials used during login. It is almost always necessary to prompt the user and see if there is an alternate way to login before creating a new user. This will reduce confusion and user game progression merging issues in cross-platform situations.
If the application intends to create a new product user ID for the user, then simply call EOS_Connect_CreateUser with the EOS_Connect_CreateUserOptions containing the EOS_ContinuanceToken from the previous call to EOS_Connect_Login.
Pass the EOS_HConnect handle, your EOS_Connect_CreateUserOptions structure, and your callback information to the function. Provided that the EOS_HPlatform handle is ticking, the callback you provided will execute when the operation finishes.

but i can not get EOS_ContinuanceToken

can you help me with finding the EOS_COntinuanceToken? thanks a lot

[wakuyaku]

@deveshmishrabetide looking for help!