diff --git a/docs/2_development.md b/docs/2_development.md
index 22041ac..2b0e88c 100644
--- a/docs/2_development.md
+++ b/docs/2_development.md
@@ -145,9 +145,6 @@ The required fields are:
   be the server-side key created in [setup](1_setup.md) in GCP
   [Credentials](https://console.cloud.google.com/apis/credentials)
 - `cloudProjectId`: Your Google Cloud project ID
-
-The optional fields are:
-
 - `twitterApiCredentials`: Your credentials for the Twitter APIs.
 
 All together, your config should look something like one of the two configs
diff --git a/src/server/middleware/twitter.middleware.ts b/src/server/middleware/twitter.middleware.ts
index 207fbf3..55bf015 100644
--- a/src/server/middleware/twitter.middleware.ts
+++ b/src/server/middleware/twitter.middleware.ts
@@ -298,8 +298,8 @@ function loadTwitterData(
   }
 
   const auth: AxiosBasicCredentials = {
-    username: credentials!.username,
-    password: credentials!.password,
+    username: credentials.username!,
+    password: credentials.password!,
   };
 
   return axios
diff --git a/src/server/serving.ts b/src/server/serving.ts
index dda51fb..0961957 100644
--- a/src/server/serving.ts
+++ b/src/server/serving.ts
@@ -72,12 +72,17 @@ export interface Config {
 }
 
 export interface TwitterApiCredentials {
-  accountName: string;
+  // The below three fields are necessary if using Enterprise Full-Archive
+  // Search.
+  accountName?: string;
+  password?: string;
+  username?: string;
+  // The below two fields are necessary for the Blocks, Mutes, and Hide Replies
+  // APIs.
   appKey: string;
   appToken: string;
+  // Necessary if using v2 Full-Archive Search.
   bearerToken?: string;
-  password: string;
-  username: string;
 }
 
 export interface WebAppCredentials {