[#118026517] Refactor username suggestion
[#118026517] Refactor username suggestion

bigdatauniversity/edx-platform,cognitiveclass/edx-platform,bigdatauniversity/edx-platform,bigdatauniversity/edx-platform,cognitiveclass/edx-platform,cognitiveclass/edx-platform,cognitiveclass/edx-platform,bigdatauniversity/edx-platform,cognitiveclass/edx-platform,bigdatauniversity/edx-platform