### LOGIN -- present a full login link
- Syntax: `%LOGIN%`
- Expand to:
- Related: [[TWikiUserAuthentication]], [[SESSIONID|Main/WebHome#VarSESSIONID]], [[SESSIONVAR|Main/WebHome#VarSESSIONVAR]], [[LOGOUT|Main/WebHome#VarLOGOUT]], [[SESSION_VARIABLE|Main/WebHome#VarSESSION_VARIABLE]]