permit empty-string passwords at the prompt

Previously the behavior was to keep prompting until a nonempty value
was entered, disallowing the empty string as a password.

Author: rolandwalker

changelog.md

@@ -15,6 +15,7 @@ Bug Fixes
 * Guard against missing contributors file on startup.
 * Friendlier errors on password-file failures.
 * Better handle empty-string passwords.
+* Permit empty-string passwords at the interactive prompt.
 
 
 Internal

mycli/main.py

@@ -488,7 +488,9 @@ def _connect() -> None:
                     if password_from_file is not None:
                         new_passwd = password_from_file
                     else:
-                        new_passwd = click.prompt(f"Password for {user}", hide_input=True, show_default=False, type=str, err=True)
+                        new_passwd = click.prompt(
+                            f"Password for {user}", hide_input=True, show_default=False, default='', type=str, err=True
+                        )
                     self.sqlexecute = SQLExecute(
                         database,
                         user,