Build a Caesar Cipher - Step 15

Tell us what’s happening:

Why my code doesn’t work like this? I tried everything

Your code so far

def caesar(text, shift):
    alphabet = 'abcdefghijklmnopqrstuvwxyz'
    shifted_alphabet = alphabet[shift:] + alphabet[:shift]

# User Editable Region

    translation_table = str.maketrans(alphabet + alphabet.upper, shifted_alphabet + shifted_alphabet.upper)

# User Editable Region

    return text.translate(translation_table)


encrypted_text = caesar('freeCodeCamp', 3)
print(encrypted_text)

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Challenge Information:

Build a Caesar Cipher - Step 15

please see again how to use upper, you are missing something