Update API Design detail : flow,SD,CD,Spec for login function
Delete ~$BLOG_API_Spec.xlsx
Delete ~$BLOG_API_SD.xlsx
Delete ~$BLOG_API_CD.xlsx
Delete ~$BLOG_API_Flow.xlsx
Update FD for user login, edit get user active
Merge branch '18213_API_DESIGN' of https://github.com/lam-vy-mulodo/blog into 18213_API_DESIGN
Merge branch '18213_API_DESIGN'

Conflicts:
	doc/API_Design/API_Detail/BLOG_API_CD.xlsx
	doc/API_Design/API_Detail/BLOG_API_Flow.xlsx
	doc/API_Design/API_Detail/BLOG_API_SD.xlsx
	doc/API_Design/API_Spec/BLOG_API_Spec.xlsx
Update API design for user login