💂 Add better description for authentication. (#275)

* 💂 Add better description for authentication.

* caps page metadata.

Author: mxbaylee

api-playground/mdx/authentication.mdx

@@ -9,6 +9,8 @@ You can add an authentication method to your mint.json to enable it on every pag
 
 The page's authentication method will override mint.json if both are set.
 
+### Bearer Token
+
 <CodeGroup>
 
 ```json mint.json
@@ -19,7 +21,7 @@ The page's authentication method will override mint.json if both are set.
 }
 ```
 
-```md page metadata
+```md Page Metadata
 ---
 title: "Your page title"
 authMethod: "bearer"
@@ -28,36 +30,58 @@ authMethod: "bearer"
 
 </CodeGroup>
 
-## Supported Authentication Methods
-
-- bearer
-- basic
-- none
-
-The "none" authentication method is useful to disable authentication on a specific endpoint after setting a default in mint.json.
-
-## Authentication Name
+### Basic Authentication
 
-By default, basic authentication asks for username and password. However, basic authentication can use a different name for username and password. For example, you could have called it `user-id:user-key`.
-
-You can set the name property in mint.json to override the default functionality. Use colons to separate each property you want to request.
+<CodeGroup>
 
-```json Custom username and password
+```json mint.json
 "api": {
     "auth": {
-        "method": "basic",
-        "name": "user-id:user-key"
+        "method": "basic"
     }
 }
 ```
 
-You can also request a single API key by excluding the colon.
+```md Page Metadata
+---
+title: "Your page title"
+authMethod: "basic"
+---
+```
+
+</CodeGroup>
 
-```json Custom username and password
+### API Key
+
+<CodeGroup>
+
+```json mint.json
 "api": {
     "auth": {
         "method": "key",
-        "name": "my-api-key"
+        "name": "x-api-key"
     }
 }
 ```
+
+```md Page Metadata
+---
+title: "Your page title"
+authMethod: "key"
+---
+```
+
+</CodeGroup>
+
+### None
+
+The "none" authentication method is useful to disable authentication on a specific endpoint after setting a default in mint.json.
+
+<CodeGroup>
+```md Page Metadata
+---
+title: "Your page title"
+authMethod: "none"
+---
+```
+</CodeGroup>