Can someone tell me What Type of encryption this is and How do I find the encryption key from Apk

digest=449ecb8fcf9f3ca0fd7cc28d30c6cfb312eaac569401646ea6b304dc282ea9f6

I used libero mail apk to sniff a API and Post Data Contains this digest and Idk How to make a digest and find the key with Ob2