database - Should i use foreign key or not -

Suppose that I want to create a database to store a user's login and personal details, > Create a table

  only one table table user username (varchar255) | User_id (int) | Name (varchar255) | Gender (0,1,2) | DOB (date) | Password (char64) |   
 or  Two tables with a foreign key   
  table User_ login User_id (int) | Username (varchar255) | Password (char64) | And Table User_Detail User_id (int) | Name (varchar255) | Gender (0,1,2) | DOB (date) |    
 
 
 Ask yourself these questions.  
 Does the user have one or more than one user name?  
 Will a user have one or more passwords?  
 Does a user have one or more names?  
 Does a user have one or more than one gender?  
 Does a user have one or more birthdate?  
 When the answer to a question is "one", that column is in the user table.  
 When the answer to a question is "more than one", that column is in a separate table.  
 This process is called the first normal form.