Function run_db_migration 

pub fn run_db_migration(
    conn: &mut Connection,
) -> Result<(), Box<dyn Error + Send + Sync + 'static>>

Runs all pending database migrations.

Will return an error if the database connection is invalid, or if any of the migrations fail. Otherwise, it returns Ok()

Errors

• If the database connection is invalid
• If checking for pending database migrations fails
• If any of the database migrations fail