docs(README): add comprehensive instructions in usage (#631)

README.md

@@ -53,12 +53,33 @@ go build .
 
 ## Usage
 
-1. Run the `discordo` executable with no arguments.
+### Password
 
-> If you are logging in using an authentication token, provide the `token` command-line flag to the executable (eg: `--token "OTI2MDU5NTQxNDE2Nzc5ODA2.Yc2KKA.2iZ-5JxgxG-9Ub8GHzBSn-NJjNg"`). Alternatively, set the value of the `DISCORDO_TOKEN` environment variable to the authentication token. The token is stored securely in the default OS-specific keyring.
+1. Run the `discordo` executable with no arguments.
 
 2. Enter your email and password and click on the "Login" button to continue.
 
+### Token
+
+Provide the `token` command-line flag to the executable. 
+
+```sh
+discordo --token "OTI2MDU5NTQxNDE2Nzc5ODA2.Yc2KKA.2iZ-5JxgxG-9Ub8GHzBSn-NJjNg"
+```
+
+Alternatively, set the value of the `DISCORDO_TOKEN` environment variable to the authentication token.
+
+> [!TIP]
+> You can manually set the token to the keyring using the instructions [here](#manually-adding-token-to-keyring).
+
+### QR
+
+1. Run the `discordo` executable with no arguments.
+
+2. Click on the "Login with QR" button.
+
+3. Follow the instructions in the QR Login screen.
+
 ## Configuration
 
 The configuration file allows you to configure and customize the behavior, keybindings, and theme of the application.