Merge remote-tracking branch 'gitup/groupfinding_module' into groupfinding_module

# Conflicts:
#	gemeinsamforschen/src/main/java/unipotsdam/gf/config/GFRocketChatConfig.java
#	gemeinsamforschen/src/main/java/unipotsdam/gf/taglibs/ChatWindow.java

gemeinsamforschen/src/main/java/unipotsdam/gf/modules/communication/service/CommunicationService.java

@@ -260,7 +260,7 @@ public class CommunicationService implements ICommunication {
         rocketChatAuth.put("password", user.getPassword());
 
         HttpResponse<RocketChatLoginResponse> response =
-                unirestService.post(ROCKET_CHAT_API_LINK + "login").body(rocketChatAuth)
+                unirestService.post(ROCKET_CHAT_API_LINK + "register").body(rocketChatAuth)
                         .asObject(RocketChatLoginResponse.class);
 
         if (isBadRequest(response)) {