chore: use basic auth for api requests

Author: Steffen911

README.md

@@ -46,4 +46,5 @@ as well.
    ```
 3. Generate the new client code using `npx fern-api generate --api server`.
 4. Manually set the `package` across all files to `com.langfuse.client`.
-5. Commit the changes in langfuse-java and push them to the repository.
+5. Overwrite `this.clientOptionsBuilder.addHeader("Authorization", "Bearer " + encodedToken);` to `Basic` in LangfuseClientBuilder.java.
+6. Commit the changes in langfuse-java and push them to the repository.

src/main/java/com/langfuse/client/LangfuseClientBuilder.java

@@ -79,7 +79,7 @@ public LangfuseClientBuilder httpClient(OkHttpClient httpClient) {
   public LangfuseClient build() {
     String unencodedToken = username + ":" + password;
     String encodedToken = Base64.getEncoder().encodeToString(unencodedToken.getBytes());
-    this.clientOptionsBuilder.addHeader("Authorization", "Bearer " + encodedToken);
+    this.clientOptionsBuilder.addHeader("Authorization", "Basic " + encodedToken);
     if (xLangfuseSdkName != null) {
       this.clientOptionsBuilder.addHeader("X-Langfuse-Sdk-Name", this.xLangfuseSdkName);
     }