title: Save user database connection in my database
body: <p>I am developing an application where I have to create a connection to my own database, and a connection to the database with the access information that the user must provide in his own registration.</p>
  <p>We are working on a unique application that should serve multiple customers, using node w/ typeORM on backend.</p>
  <p>I know that for my connection I can use the .env from my own application.</p>
  <p>But the connection that the user provides, I understand that I cannot save using plain text in the database.</p>
  <p>So the question is: is it okay to save this to a mysql database?</p>
  <p>How can I save this data in the most secure way possible?</p>