Find encryption method from a decompiled apk -- 2

I am looking for someone who can help me find the encryption method used in a decompiled apk.
The app is sending a post request to the API after encrypting the input.
I want to get the encryption logic so I can send the request directly to the API.
I can provide you with the input and the encrypted string.
Please check the attached screenshot and mention the highlighted line number to verify you've read the project details.
Fixed Budget - 500 INR
Ideal skills and experience:
- Knowledge of Java programming language
- Familiarity with encryption methods and techniques