Ryan Bryant

HTMLimport maildata #Variable to store user data
users = {Elaine Tusko}

# A function to generate a random 4-digit code
def generate_verification_code():
return random.randint(1000, 9999)

# Step 1: User registration
def register_user(username, password, phone_number):
# Check if the user already exists
if username in users:
print("Error: User already exists")
return False

# Add the user to the database
users[username] = {
'password': password,
'phone_number': phone_number,
'verification_code': None
}
print("User registered successfully")
return True

# Step 2: User login
def login_user(username, password):
# Check if the user exists
if username not in users:
print("Error: User not found")
return False

# Check if the password is correct
if password != users[username]['password']:
print("Error: Invalid password")
return False

# Step 2a: Generate a verification code
verification_code = generate_verification_code()
users[username]['verification_code'] = verification_code

HTML'verification_code': None
}
print("User registered successfully")
return True

# Step 2: User login
def login_user(username, password):
# Check if the user exists
if username not in users:
print("Error: User not found")
return False

# Check if the password is correct
if password != users[username]['password']:
print("Error: Invalid password")
return False

# Step 2a: Generate a verification code
verification_code = generate_verification_code()
users[username]['verification_code'] = verification_code

# Step 2b: Send the verification code to the user's phone number
print(f"Verification code sent to

HTML# Return True to indicate successful login
return True
# Step 3: User verification
def verify_user(username, verification_code):
# Check if the user exists
if username not in users:
print("Error: User not found")
return False

# Check if the verification code is correct
if verification_code != users[username]['verification_code']:
print("Error: Invalid verification code")
return False

# Clear the verification code for security purposes
users[username]['verification_code'] = None

# Return True to indicate successful verification
print("User verified successfully")
return True