docs: update clientId explanation (#1559)

api-connection.html

@@ -138,8 +138,11 @@ <h2 id="function_newConnection">new Connection(config)</h2>
           <ul>
             <li>username (string): A user needs to provide the `userName` associated to their account.</li>
             <li>password (string): A user needs to provide the `password` associated to their account.</li>
-            <li>clientId (string): Application (`client`) ID from your registered Azure application. This currently is optional
-              and uses a default clientId, but a user-provided clientId will be required in the near future.
+            <li>clientId (string): Application (`client`) ID from your registered Azure application. 
+              The application has to have public client flows enabled and has to have `user_impersonation` 
+              permissions for Azure SQL Database. The user account that is being used also has to be assigned
+              to the application, and has to grant consent (either explicitly or via admin consent).
+              Note: the previously provided default client ID will expire in the near future and stop working.
             </li>
             <li>tenantId (string): Optional parameter for specific Azure tenant ID. (default: <code>common</code>).
               If your server does not support the <code>/common</code> endpoint, please provide a tenantId.

frequently-encountered-problems.html

@@ -75,6 +75,17 @@ <h3>Tedious Configurations</h3>
 
     </dd>
     <br />
+    <dt>
+        <h2>Providing a client ID when using <code>azure-active-directory-password</code></h2>
+    </dt>
+    <dd>
+        <p>The clientId field is now mandatory when using the <code>azure-active-directory-password</code> authentication type.</p>
+        <p>Microsoft-owned drivers have a default hard-coded client ID. Because Tedious is NOT a Microsoft-owned driver, 
+            the previously provided default client ID has been removed from Tedious. It will expire in the near future and stop working.</p>
+        <p>Please refer to the <a href="https://tediousjs.github.io/tedious/api-connection.html#function_newConnection">connection</a> 
+            API documentation for more information and alternate Azure connection methods.</p>
+    </dd>
+    <br />
     <dt>
         <h2>Remote Azure Connection</h2>
     </dt>