title: How do I check that login and password entered is valid
body: <p>I am trying to create a login funcitonality in android studio in which I verify  entered password and login exist in database and go together(based on information in the login database) This should happen when the user clicks "button check login" 
  If the info is accurate it should take the user to a welcome screen. </p>
  
  <p>I am struggling with how to check the information according to the database. Please help!</p>