In short: No.
Once your account is created using a particular sign-in method, that method is permanently tied to your account and cannot be changed.
XBert supports four sign-in methods:
Google
Xero
Intuit
Email and password
If you try to sign in using a different method - even with the same email address - XBert will attempt to create a brand new, separate account with no access to your original data, tasks, or roles.
Always use the same sign-in method you used when your account was first created.
If you are unsure which method you used, contact your administrator or reach out to XBert support at: support@xbert.io