Allow configuring gitlab deploy tokens via config command, refs #9373

src/Composer/Command/ConfigCommand.php

@@ -703,6 +703,9 @@ EOT
                 }
                 $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                 $this->authConfigSource->addConfigSetting($matches[1].'.'.$matches[2], array('consumer-key' => $values[0], 'consumer-secret' => $values[1]));
+            } elseif ($matches[1] === 'gitlab-token' && 2 === count($values)) {
+                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
+                $this->authConfigSource->addConfigSetting($matches[1].'.'.$matches[2], array('username' => $values[0], 'token' => $values[1]));
             } elseif (in_array($matches[1], array('github-oauth', 'gitlab-oauth', 'gitlab-token', 'bearer'), true)) {
                 if (1 !== count($values)) {
                     throw new \RuntimeException('Too many arguments, expected only one token');