Allow overriding snowflake authenticator parameter

Set default username_password_mfa authenticator option only if the custom URL is not provided by the user. This allows overriding it with custom value like 'externalbrowser'.

Additionally, we skip asking about the password if --password flag is not provided to allow using passwordless auth options.

Author: kpiotrowski

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/connector/snowflake/AbstractSnowflakeConnector.java

@@ -120,8 +120,13 @@ private DataSource createUserPasswordDataSource(@Nonnull ConnectorArguments argu
     Properties prop = new Properties();
 
     prop.put("user", arguments.getUser());
-    prop.put("password", arguments.getPasswordOrPrompt());
-    prop.put("authenticator", "username_password_mfa");
+    if (arguments.isPasswordFlagProvided()) {
+      prop.put("password", arguments.getPasswordOrPrompt());
+    }
+    // Set default authenticator only if url is not provided to allow user overriding it
+    if (arguments.getUri() == null) {
+      prop.put("authenticator", "username_password_mfa");
+    }
     return new SimpleDriverDataSource(driver, url, prop);
   }