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