How can i change my nickname from YouAreDeadToMeD to YouAreDeadToMe (failed with last letter)?
No one will reply, because you are dead to all of us! 
your current name rhymes, much cooler xD
Unfortunately there is no way at the moment for users to change their GA.ME username 
It’s something we’ll work on eventually, probably as part of the work on an “Account Portal” for all Oort players - where you’ll be able to manage your user account details for the game and associated web sites.
For me this topic also throws up a second question: will the account name be viewable in game if an other player looks at my character? Or is it hidden so that only the people I want to know my account name (for friend list issues for example)?