Write and tune SQL to query the database for the login form

[Bhoomichha]

Connect the database with the project/system and retrieve the data from database to check if the entered username matches with the password as saved in the database.

[Bhoomichha]

Since we decided to only use the google account login, the database is functional if their email and password is correct. Once the user logs in or registers with the correct credentials, their details will be saved in the database.