# defining variables
create_username = 0
create_password = 0
password = 0
username = 0

# creates a users dictionary
users = {
    'Joe': 'juk725',
    'Mat': 'axr3',
    'Th3_j0k3r': 'bl4z3'
}
while username not in users and username != 'signup':
    username = input("enter username(type signup tocreate an account): ")

    # add new user to dictionary
    if username == "signup" or username == "Signup":
        create_username = input("enter a new username: ")
        create_password = input("enter a new password: ")

    if create_password in users:
        create_password = input("password taken re-enter: ")
    if create_username==create_password:
        create_password=input("password cannot be the same as your usename re-enter: ")
    # then adds the new username to the users dictionary
    if username == 'signup':
        users[create_username] = create_password

else:
    if username in users:
        password = input("enter password: ")

    if password in users:
        print("access granted")

# just to see if it works
print(users)