Theme Options > General > header Settings > Enable Sign In link.
Also, you can create footer content using a static block. To get VC editor shown for static blocks go to wp-dashboard > WPBakery Page Builder > Role Manager > Post Types > Custom > tick “static blocks”. Then set your block in Appearance > Widgets > Footer Area.
Here is an example of My account link – My Account
Let us know if you need any further assistance.
