Set LDAP as main login method


I have set up LDAP and everything works.
There is just one thing Id like to change.

When i type in my LDAP credentials to login i have to use the button “Login with LDAP” for a successful login.
Is it possible to use the enter key instead of the “Login with LDAP” to have a successful login or is the button the only way to login with LDAP?