two installations

due to my great ability to screw up I did it again.

Had one wordpress website, cool, however when I downloaded second one, for another domain. the big mistake was by not paying attention is I used the same user name with second same as the first. so cant get into the second one. looked around somewhat,

so would I have to uninstall the second one. and reinstall, however being done used the new domain screw things up more. not sure if explained right.

I know in user settings in dashboard user names cant be changed. that’s the rub.

any suggestions??

did have a thought just install again with same domain name and just changed user name this time around? want to be sure.

thx