The Mer Wiki now uses your Mer user account and password (create account on https://bugs.merproject.org/)
Talk:Building against Mer in Community OBS
From Mer Wiki
I suggest changing the name of the Page to "Building against Mer in COBS" as a Google search for "OBS Mer" does not show it as a top result. I've never seen the abbreviation "COBS" anywhere before and would never have thought to search for it.