title: How to add ASP.NET MVC5 Identity Authentication to existing database
body: <p>I am learning MVC5 identity authentication and was reading materials on www.asp.net.
  I have a few questions here.</p>
  
  <ol>
  <li><p>If I want to use identity authentication, is there a reason not to use MVC template? Or is there a reason to use empty template? MVC template also provides bootstrap.</p></li>
  <li><p>I have a database created, I want to have a DB first development. If I use the MVC template, the database for credentials will be created under the project folder. How can I merge the two database or I should just use two databases?</p></li>
  </ol>
  
  <p>If my question is silly, just ignore me or give tell me what to read first. 
  I know people in the community are good but critical.
  Thank you</p>