title: Update an entity in Symfony 4?
body: <p>My question is simple, but I can't find a fine answer to it, I had an entity created by a command line :</p>
  <blockquote>
  <p>php bin/console make:entity</p>
  </blockquote>
  <p>this entity is User that has few attribute ( name - email - password )</p>
  <p>After inserting the fields, I migrated, so my table has been created in the database using those commandlines :</p>
  <blockquote>
  <p>php bin/console make:migration</p>
  <p>php bin/console doctrine:migration:migrate</p>
  </blockquote>
  <p>But now I want to just change the <strong>name</strong> to a <strong>username</strong> but I don't know how to do it.</p>
  <p>I did not find anything in the documentation, so any help would be much appreciated.</p>