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+This option adds or changes the API key!
+
+Usage:
+
+`ddns -a AIzaSyDaGmWKa4JsXZ-HjGw7ISLn_3namBGewQe`
+
+or
+
+`ddns --api AIzaSyDaGmWKa4JsXZ-HjGw7ISLn_3namBGewQe`
+
+If there is no API key present it creates/ stores the key in the local db. If there is an API key presents it updates/rewrites the API key in the db and uses this key from now on.
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