MNHQ.. How do I name change?

[PamShoo]

Hi! Long time lurker/recent newbie here. I know HOW to namechange but since I signed up here using my gmail account lazy slattern I wasn't prompted to create a password. Name changing obviously requires a password - so what do I do? Use my gmail password? Can I not namechange due to my slatternly ways?

Thank you, sorry if my point isn't put across too well