How can I sign in to one account and sign in to another account at the same time?

[lizhongyue248]

Now, I have three porviders: Credentials, GitHub, GitLab. How can I sign in to one account and sign in to another account at the same time?

Steps:

1. Sign in my Credential
2. Sign in my Github/Gitlab account, and bind to 1 step Credential account.

In the current situation, the sign in the first step is successful. After the sign in the second step is successful, the account in the first step will automatically sign out. I can't bind the two accounts, nor can I get the first step account information in the sign in the second step.