Azure Entra ID auth

[petrkr]

As Azure support "one time" token as mysql password, there is need to replace password after expire. Would be nice if library will know that itself. For now I do not know if I can simply replace password or I have to destroy instance and create new one with new password / token

I have tested connection is NOT dropped after token expiration, so this change applies only in case of reconnect, where is possibility to need already new password in connection string.

Ref: https://learn.microsoft.com/en-us/azure/mysql/single-server/how-to-configure-sign-in-azure-ad-authentication

[methane]

See #1469

[petrkr]

Thanks, so basically, not supported yet. Thanks. I did for now new instance for every new token. If that PR will be merged, I will rewrite that mess-code to new interface.