My client had an old website, domain registered and hosted by the same company.
I made a new wordpress website for him on a godaddy server, everything worked well (I used a testdomain on godaddy for this website). This morning I changed the nameservers, IP address was changed, everything points now to the hosted website on godaddy. However, I can not log in to my wordpress admin account anymore, probably because I logged in before on the testdomain, but that one doesn't work anymore. The new website on godaddy is online now, but it has some errors I have to fix. I need again access to the wordpress admin