You've turned on two-factor authentication for @thomasmini96322
This means you’ll need to use a second authentication method in addition to your password when you log in to X. You can turn off two-factor authentication any time in the Account > Security section of your X settings.
Make sure to save a single-use backup code in a safe place. This lets you log in to X if you lose your mobile phone or don’t have access to any of your other two-factor authentication methods.