#31 API further credential

* adds Kspuser as another expected header data to resolve the api user
* adds/updates translations

api/settings.py

@@ -5,4 +5,5 @@ Contact: michel.peltriaux@sgdnord.rlp.de
 Created on: 21.01.22
 
 """
-KSP_TOKEN_HEADER_IDENTIFIER = "Ksptoken"
+KSP_TOKEN_HEADER_IDENTIFIER = "Ksptoken"
+KSP_USER_HEADER_IDENTIFIER = "Kspuser"