Use variable from another script with WWW give NULL?

Hi, I'm trying to use a variable from another script attached to "Main Camera". I do get the variable to output correctly on Debug.Log and GUI.Label but I can't get it to work with WWW...

EDIT NOTE: At this point I have already successfully logged in with the Wusername. I'm trying to query another DB with a already successfully used variable.

 public string Wusername;
 
 Wusername = GameObject.Find("Main Camera").GetComponent<login>().userNameGet;
 
                 WWWForm form = new WWWForm();
                 form.AddField(Wusername, Wusername);
                 form.AddField("securityKeyGetCharInfo", securityKeyGetCharInfo);
                 WWW GetCharacterAPI = new WWW(secureKeyGetCharInfoURL, form);
                 StartCoroutine(GetCharacter(GetCharacterAPI));

The web page is receiving Wusername as null. What could I do to fix this?

I want this to be able to work without having to type it in a textfield again. If it can't be done I'd like to know another way to do this.

Thanks in advance for your time and help! :)