Check that user is added

src/freedombone-app-matrix

@@ -124,7 +124,11 @@ function add_user_matrix {
 
     cd /etc/matrix/scripts
     register_new_matrix_user -c ${MATRIX_DATA_DIR}/homeserver.yaml https://localhost:${MATRIX_PORT} -u "${new_username}" -p "${new_user_password}" -a
-    echo '0'
+    if [ ! "$?" = "0" ]; then
+        echo '1'
+    else
+        echo "0"
+    fi
 }
 
 function install_interactive_matrix {
@@ -355,6 +359,10 @@ function install_matrix {
         fi
     fi
 
-    add_user_matrix "${MY_USERNAME}" "${MATRIX_PASSWORD}"
+    if [[ $(add_user_matrix "${MY_USERNAME}" "${MATRIX_PASSWORD}") != "0" ]]; then
+        echo $'Failed to add matrix admin user';
+        exit 879352
+    fi
+
     APP_INSTALLED=1
 }