diff --git a/src/SASViyaApiClient.ts b/src/SASViyaApiClient.ts
index 643bf74..ea5cdb0 100644
--- a/src/SASViyaApiClient.ts
+++ b/src/SASViyaApiClient.ts
@@ -548,6 +548,7 @@ export class SASViyaApiClient {
 
   /**
    * Exchanges the refresh token for an access token for the given client.
+   * This method can only be used by Node.
    * @param clientId - the client ID to authenticate with.
    * @param clientSecret - the client secret to authenticate with.
    * @param refreshToken - the refresh token received from the server.
diff --git a/src/auth/getTokens.ts b/src/auth/getTokens.ts
index 340331a..b4557e2 100644
--- a/src/auth/getTokens.ts
+++ b/src/auth/getTokens.ts
@@ -10,6 +10,7 @@ import { refreshTokensForSasjs } from './refreshTokensForSasjs'
 
 /**
  * Returns the auth configuration, refreshing the tokens if necessary.
+ * This function can only be used by Node, if a server type is SASVIYA.
  * @param requestClient - the pre-configured HTTP request client
  * @param authConfig - an object containing a client ID, secret, access token and refresh token
  * @param serverType - server type for which refreshing the tokens, defaults to SASVIYA
diff --git a/src/auth/refreshTokensForViya.ts b/src/auth/refreshTokensForViya.ts
index fe5f2b7..4fb8f80 100644
--- a/src/auth/refreshTokensForViya.ts
+++ b/src/auth/refreshTokensForViya.ts
@@ -6,6 +6,7 @@ import { isNode } from '../utils'
 
 /**
  * Exchanges the refresh token for an access token for the given client.
+ * This function can only be used by Node.
  * @param requestClient - the pre-configured HTTP request client
  * @param clientId - the client ID to authenticate with.
  * @param clientSecret - the client secret to authenticate with.