feat: Support Flex Auth

Author: moretalk

src/templates/core/axios/getHeaders.hbs

@@ -1,7 +1,7 @@
 async function getHeaders(options: ApiRequestOptions, config: OpenAPIConfig2, formData?: FormData): Promise<Record<string, string>> {
     const token = await resolve(options, config.token);
-    const username = await resolve(options, config.accountSid);
-    const password = await resolve(options, config.authToken);
+    const accountSid = await resolve(options, config.accountSid);
+    const authToken = await resolve(options, config.authToken);
 
     const headers = Object.entries({
         Accept: 'application/json',
@@ -13,12 +13,16 @@ async function getHeaders(options: ApiRequestOptions, config: OpenAPIConfig2, fo
         [key]: String(value),
     }), {} as Record<string, string>);
 
+    if (isStringWithValue(accountSid) && isStringWithValue(token)) {
+        headers['Authorization'] = `Flex ${accountSid}:${token}`;
+    }
+
     if (isStringWithValue(token)) {
         headers['Authorization'] = `Bearer ${token}`;
     }
 
-    if (isStringWithValue(username) && isStringWithValue(password)) {
-        const credentials = base64(`${username}:${password}`);
+    if (isStringWithValue(accountSid) && isStringWithValue(authToken)) {
+        const credentials = base64(`${accountSid}:${authToken}`);
         headers['Authorization'] = `Basic ${credentials}`;
     }