Improve client credentials sample

- Reword a passage in the README for improved clarity
- Adjust whitespace in various files

Author: waldyrious

rest-api/javascript/authentication/client-credential-flow/.env.example

@@ -1,5 +1,5 @@
 # Base Url endpoint
-BASE_URL='https://api-sandbox.uphold.com'
+BASE_URL = 'https://api-sandbox.uphold.com'
 
 CLIENT_ID = ''
 CLIENT_SECRET = ''

rest-api/javascript/authentication/client-credential-flow/README.md

@@ -1,6 +1,7 @@
 # Client credentials flow
 
-This sample project demonstrates how to authenticate in the Uphold API using the client credentials flow. For further background, please refer to the [API documentation](https://uphold.com/en/developer/api/documentation).
+This sample project demonstrates how to authenticate in the Uphold API using the [OAuth 2.0 client credentials](https://www.oauth.com/oauth2-servers/access-tokens/client-credentials/) flow.
+For further background, please refer to the [API documentation](https://uphold.com/en/developer/api/documentation).
 
 ## Summary
 
@@ -13,7 +14,7 @@ This sample project performs the following actions:
 
 **Important notice:** In Uphold's production environment, client credentials authentication is only available for **business accounts**, and requires manual approval from Uphold.
 Please [contact Uphold](mailto:developer@uphold.com) to obtain this permission.
-For applications that use the sandbox environment, as is the case with this demo project, those requirements can be skipped.
+For requests made in the sandbox environment, as is the case with this demo project, those requirements can be skipped.
 
 ## Requirements
 

rest-api/javascript/authentication/client-credential-flow/cc-flow.js

@@ -12,11 +12,13 @@ const { encode } = b64Pkg;
 /**
  * Dotenv configuration.
  */
+
 dotenv.config({ path: path.resolve() + "/.env" });
 
 /**
  * Get Token.
  */
+
 export async function getToken() {
   // Base64-encoded authentication credentials
   const auth = encode(process.env.CLIENT_ID + ":" + process.env.CLIENT_SECRET);
@@ -49,6 +51,7 @@ export async function getToken() {
 /**
  * Get assets.
  */
+
 export async function getAssets(token) {
   try {
     const response = await axios.get(`${process.env.BASE_URL}/v0/assets`, {