Hello guys, i'm trying to create a visualforce that returns the account and contacts, of the logged user but its returning this error List has no rows for assignment to SObject.

this is my controller

public with sharing class AnalyticsRevendaController {
	public Account contas   {get;set;} 
    public Contact contato  {get;set;}
    public User	   usuario  {get;set;}
    public String  userId 	{get;set;}
    
  
    // Detecta os valores do usuário ativo
	 public User activeUser = [SELECT AccountId,ContactId FROM User WHERE Id = :userId LIMIT 1];
     public String userAccount = activeUser.AccountId;
   	 public String userContact = activeUser.ContactId;
    
    public AnalyticsRevendaController(){
    //Retorna os dados do usuário Logado
    contas = new Account();
    userId = UserInfo.getUserId(); 
    if(userId != null && ''.equals(userId))
    	getAccount();
    } 
    
    //retorna os valores da conta do usuário ativo.
    public Account getAccount(){
			//Set<Id> setConta = new Set<Id>();
		List<Account> listContas = [SELECT Id,Name,OwnerId FROM Account WHERE Id = :userAccount];
			if(listContas.size()> 0)
				contas = listContas[0];
			return contas;
    }
    
    //retorna os valores do contato	ativo.
    public Contact getContact(){
    		 contato = [Select c.LastName, c.FirstName, c.AccountId,c.Email From Contact c
    				    WHERE Id=:userContact];
    		return contato;		   
    	}	
	}

my visualforce

 

<apex:page controller="AnalyticsRevendaController">
	
    <apex:form>
        <apex:pageBlock>
            <apex:pageBlockSection  title="Conta">
                <apex:outputtext value ="{!contas.Name}" />
                <apex:outputtext value ="{!contas.OwnerId}" />
            </apex:pageBlockSection>
              <apex:pageBlockSection  title="Contato">
                <apex:outputtext value ="{!Contact.FirstName}" />
                <apex:outputtext value ="{!Contact.LastName}" />
                <apex:outputtext value ="{!Contact.Email}" />
            </apex:pageBlockSection>
            <apex:pageBlockSection  title="Usuario">
                <apex:outputtext value ="{!$User.FirstName}" />
                <apex:outputtext value ="{!$User.LastName}" />
                <apex:outputtext value ="{!$User.Email}" />
                <apex:outputtext value ="{!userId}" />  
            </apex:pageBlockSection>
        </apex:pageBlock>
    </apex:form>
</apex:page>