Follow these steps to enable the webservice for todo4teams:

1. Select "Systems" in the main menu and add a new entry there:
   Set the clients' IP address or a wildcard pattern (as a regular expression) to filter the system that might access the services:
   
   Take the following patterns as examples:
   1. IPs:    .*       (all IPs)
   2. IPs:    192\.168\.5\.221     (the exact IP 192.168.5.221)
   3. IPs:    192\.168\.5\.\d+     (the subnet 192.168.5.*)
2. Add more system entries if needed.
3. Optional: Enable authentication for the webservices:
   1. Select "System Properties" and add an entry "RESTUSERAUTHENTICATION" with value "required", lke this:
      
   2. Select "Users" in the main menu and add a new user to be used for these services exclusively and select roles "Admin" and category "Systems".
      Set a valid password to be used in the API calls.
      
4. Use the 'curl'  command to check if the settings are correct. E.g. fetch the list of users:
   curl -u yourapiuser:yourapipassword -H "Accept: application/json" -H "Content-Type: application/json" -X GET   "https://yourtodoserver/todo4teams/rest/users"

5. Set the credentials like set above.