Lower case email before database queries (#2689)

store/sql_team_store.go

@@ -6,6 +6,7 @@ package store
 import (
 	"github.com/mattermost/platform/model"
 	"github.com/mattermost/platform/utils"
+	"strings"
 )
 
 type SqlTeamStore struct {
@@ -223,6 +224,8 @@ func (s SqlTeamStore) GetTeamsForEmail(email string) StoreChannel {
 	go func() {
 		result := StoreResult{}
 
+		email = strings.ToLower(email)
+
 		var data []*model.Team
 		if _, err := s.GetReplica().Select(&data, "SELECT Teams.* FROM Teams, Users WHERE Teams.Id = Users.TeamId AND Users.Email = :Email", map[string]interface{}{"Email": email}); err != nil {
 			result.Err = model.NewLocAppError("SqlTeamStore.GetTeamsForEmail", "store.sql_team.get_teams_for_email.app_error", nil, "email="+email+", "+err.Error())