#4 Clarify setup process

After the program was installed, it took me a while to realize the app was asking for my access token (found on the top right of https://dev.groupme.com/) rather than my password. Is there a way to clarify this? You already add the Email Address label by running `g_hash_table_insert(table, "login_label", (gpointer) _("Email address..."));`, so is there a way to do this for the password?