Added documentation to authentication screens

screens/SignInScreen.js

@@ -19,6 +19,13 @@ import { Button } from "react-native-paper";
 import CustomActivityIndicator from "../components/CustomActivityIndicator";
 import { NAME_MAX_LENGTH } from "../constants/inputRequirements";
 
+/**
+ * This component renders the screen where the user can sign in. The actual sign in process is done in a user action through redux. 
+ * 
+ * @param {*} props - used for redux and navigation. 
+ * 
+ * @returns the component. 
+ */
 const _SignInScreen = (props) => {
   const { onUserLogin } = props;
 

screens/SignUpScreen.js

@@ -24,6 +24,14 @@ import APIKit from "../APIkit";
 import CustomActivityIndicator from "../components/CustomActivityIndicator";
 import { toast500, toastError, toastSuccess } from "../constants/toasts";
 
+/**
+ * This component renders the screen where the user can create a new user. They will be navigated to the sign in screen when the user is
+ * created, and has to wait for an administrator to grant them access to use the application. 
+ * 
+ * @param {*} navigation - extracted from props, used for navigation
+ * 
+ * @returns the component. 
+ */
 const SignUpScreen = ({ navigation }) => {
   const [name, setName] = useState("");
   const [email, setEmail] = useState("");

screens/VerifyPasswordScreen.js

@@ -12,6 +12,15 @@ import APIKit from "../APIkit";
 import CustomActivityIndicator from "../components/CustomActivityIndicator";
 import { toast500, toastError } from "../constants/toasts";
 
+/**
+ * This component renders the screen where the user needs to re-authenticate to get access to a critical feature. 
+ * 
+ * @param {*} route - extracted from props, used to get data from the previous screen. In this case, to know which screen should be 
+ *                    navigated to next. 
+ * @param {*} navigation - extracted from props, used for navigation. 
+ *  
+ * @returns the component. 
+ */
 const VerifyPasswordScreen = ({ route, navigation }) => {
   const { nextNavigation } = route.params;