DynamoDBMappingException: no RANGE key value present

I am new to NoSQL and Amazon Dynamo DB. I am trying to retreive a user by username first from a DynamoDB UserMaster table.

I have a table UserMaster with 5 attributes(username, correct-hash, email, lastLogin, role), each of type String and I have a corresponding UsermasterBean mapped to the table UserMaster. UserMaster table's Partition Key(Hashkey) is username and Sort key(Range Key) is correct-hash

UsermasterBean

    @DynamoDBTable(tableName = "UserMaster")
    public class UsermasterBean {
    
    private String username;
    private String correctHash;
    private String email;
    private String lastLogin;
    private String role;
    
    @DynamoDBHashKey(attributeName = "username")
    @DynamoDBAttribute(attributeName = "username")
    public String getUsername() {
        return username;
    }
    
    @DynamoDBRangeKey(attributeName = "correct-hash")
    @DynamoDBAttribute(attributeName = "correct-hash")
    public String getCorrectHash() {
        return correctHash;
    }
    
    @DynamoDBAttribute(attributeName = "email")
    public String getEmail() {
        return email;
    }
    
    @DynamoDBAttribute(attributeName = "last-login")
    public String getLastLogin() {
        return lastLogin;
    }
    
    @DynamoDBAttribute(attributeName = "role")
    public String getRole() {
        return role;
    }
    
    public void setUsername(String username) {
        this.username = username;
    }
    ....
    ....
   }

Retrieve data from UI:

UsermasterBean usermasterBean = new UsermasterBean();
UsermasterDao usermasterDao = new UsermasterDao();

usermasterBean.setUsername(username.getValue()); // Get the username from UI form
final String inputtedPassword = password.getValue(); // Get the password from UI form

UsermasterBean retrievedUserBean = usermasterDao.findByUsernameAndPassword(usermasterBean,inputtedPassword);

Validate User:

public UsermasterBean findByUsernameAndPassword(final UsermasterBean usermasterBean, final String inputtedPassword)
            throws IOException {
        AmazonDynamoDBClientHandler amazonDynamoDBClientHandler = AmazonDynamoDBClientHandler.getNewInstance();
        UsermasterBean retrievedUser;
        try {
            AmazonDynamoDB amazonDynamoDB = amazonDynamoDBClientHandler.createNewClient();
            DynamoDBMapper dynamoDBMapper = new DynamoDBMapper(amazonDynamoDB);
            retrievedUser = dynamoDBMapper.load(usermasterBean.getClass(), usermasterBean.getUsername());
            System.out.println("RETRIEVED CORRECT-HASH FROM DATABASE: " + retrievedUser.getCorrectHash()); // Check if hash retrieved is correct for this user.

            // PasswordUtilityManager.verifyPassword(inputtedPassword,retrievedUser.getCorrectHash());
        } catch (IOException ioException) {
            throw ioException;
        } finally {
            amazonDynamoDBClientHandler.shutdownClient();
        }
        return retrievedUser;
}

Problem:

retrievedUser = dynamoDBMapper.load(usermasterBean.getClass(), usermasterBean.getUsername()); throws com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMappingException

I am expecting retrievedUser.getCorrectHash() should display the hashed password stored in database as a String so that I can verify if the inputted password creates the same hash as retrieved from the database.