Merge pull request 'Remove email constratint' (#33) from remove-email-constraint into develop

Reviewed-on: #33

src/main/java/se/su/dsv/seshat/entities/AppUser.java

@@ -25,7 +25,7 @@ public class AppUser {
     @Column(nullable = false, unique = true)
     private String username;
 
-    @Column(nullable = false, unique = true)
+    @Column(nullable = false)
     private String email;
 
     @Column(nullable = false)