feat: oauth revamp + support for multiple grant types in oauth (#3885)

Co-authored-by: jamesgeorge007 <jamesgeorge998001@gmail.com>

packages/hoppscotch-cli/src/utils/pre-request.ts

@@ -109,18 +109,31 @@ export function getEffectiveRESTRequest(
         key: "Authorization",
         value: `Basic ${btoa(`${username}:${password}`)}`,
       });
-    } else if (
-      request.auth.authType === "bearer" ||
-      request.auth.authType === "oauth-2"
-    ) {
+    } else if (request.auth.authType === "bearer") {
       effectiveFinalHeaders.push({
         active: true,
         key: "Authorization",
-        value: `Bearer ${parseTemplateString(
-          request.auth.token,
-          envVariables
-        )}`,
+        value: `Bearer ${parseTemplateString(request.auth.token, envVariables)}`,
       });
+    } else if (request.auth.authType === "oauth-2") {
+      const { addTo } = request.auth;
+
+      if (addTo === "HEADERS") {
+        effectiveFinalHeaders.push({
+          active: true,
+          key: "Authorization",
+          value: `Bearer ${parseTemplateString(request.auth.grantTypeInfo.token, envVariables)}`,
+        });
+      } else if (addTo === "QUERY_PARAMS") {
+        effectiveFinalParams.push({
+          active: true,
+          key: "access_token",
+          value: parseTemplateString(
+            request.auth.grantTypeInfo.token,
+            envVariables
+          ),
+        });
+      }
     } else if (request.auth.authType === "api-key") {
       const { key, value, addTo } = request.auth;
       if (addTo === "Headers") {