fix failing scenario

ocs/pkg/service/v0/groups.go

@@ -94,15 +94,26 @@ func (o Ocs) RemoveFromGroup(w http.ResponseWriter, r *http.Request) {
 	userid := chi.URLParam(r, "userid")
 	groupid := r.URL.Query().Get("groupid")
 
-	account, err := o.fetchAccountByUsername(r.Context(), userid)
-	if err != nil {
-		merr := merrors.FromError(err)
-		if merr.Code == http.StatusNotFound {
-			render.Render(w, r, response.ErrRender(data.MetaNotFound.StatusCode, "The requested user could not be found"))
-		} else {
-			render.Render(w, r, response.ErrRender(data.MetaServerError.StatusCode, err.Error()))
+	var account *accounts.Account
+	var err error
+
+	if isValidUUID(userid) {
+		account, err = o.getAccountService().GetAccount(r.Context(), &accounts.GetAccountRequest{
+			Id: userid,
+		})
+	} else {
+		// despite the confusion, if we make it here we got ourselves a username
+		account, err = o.fetchAccountByUsername(r.Context(), userid)
+		if err != nil {
+			merr := merrors.FromError(err)
+			if merr.Code == http.StatusNotFound {
+				render.Render(w, r, response.ErrRender(data.MetaServerError.StatusCode, "The requested user could not be found"))
+			} else {
+				render.Render(w, r, response.ErrRender(data.MetaServerError.StatusCode, err.Error()))
+			}
+			o.logger.Error().Err(err).Str("userid", userid).Msg("could not get list of user groups")
+			return
 		}
-		return
 	}
 
 	_, err = o.getGroupsService().RemoveMember(r.Context(), &accounts.RemoveMemberRequest{