NewFromParams starts and returns a [*Backend] with the given params (generally read from the Teleport configuration file).

NewWithConfig starts and returns a [*Backend] with the given [Config].

AzureADAuth gets a connection token from Azure and uses it as the password when connecting.

StaticAuth uses the static credentials as defined in the connection string.

Backend is a PostgreSQL-backed [backend.Backend].

Config is the configuration struct for [Backend]; outside of tests or custom code, it's usually generated by converting the [backend.Params] from the Teleport configuration file.

AuthMode determines if we should use some environment-specific authentication mechanism or credentials.