ipn/ipnlocal: add support for multiple user profiles

Signed-off-by: Maisem Ali <maisem@tailscale.com>

control/controlclient/auto.go

@@ -590,7 +590,7 @@ func (c *Auto) sendStatus(who string, err error, url string, nm *netmap.NetworkM
 	}
 	if nm != nil && loggedIn && synced {
 		pp := c.direct.GetPersist()
-		p = &pp
+		p = pp.AsStruct()
 	} else {
 		// don't send netmap status, as it's misleading when we're
 		// not logged in.
@@ -708,7 +708,7 @@ func (c *Auto) Shutdown() {
 // used exclusively in tests.
 func (c *Auto) TestOnlyNodePublicKey() key.NodePublic {
 	priv := c.direct.GetPersist()
-	return priv.PrivateNodeKey.Public()
+	return priv.PrivateNodeKey().Public()
 }
 
 func (c *Auto) TestOnlySetAuthKey(authkey string) {

control/controlclient/direct.go

@@ -333,10 +333,10 @@ func (c *Direct) SetTKAHead(tkaHead string) bool {
 	return true
 }
 
-func (c *Direct) GetPersist() persist.Persist {
+func (c *Direct) GetPersist() persist.PersistView {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	return c.persist
+	return c.persist.View()
 }
 
 func (c *Direct) TryLogout(ctx context.Context) error {
@@ -633,6 +633,12 @@ func (c *Direct) doLogin(ctx context.Context, opt loginOpt) (mustRegen bool, new
 	if resp.Login.LoginName != "" {
 		persist.LoginName = resp.Login.LoginName
 	}
+	persist.UserProfile = tailcfg.UserProfile{
+		ID:            resp.User.ID,
+		DisplayName:   resp.Login.DisplayName,
+		ProfilePicURL: resp.Login.ProfilePicURL,
+		LoginName:     resp.Login.LoginName,
+	}
 
 	// TODO(crawshaw): RegisterResponse should be able to mechanically
 	// communicate some extra instructions from the server: