Here goes my Lightning component - 

<aura:component implements="flexipage:availableForAllPageTypes" access="global" controller="cboard_seeContacts">
    <aura:attribute name="accId" type="String" />
    <aura:attribute name="Con" type="Contact" 
                    default="{sObjectname: 'Contact',
                    FirstName:'Roza',
                    LastName:'Stalin',
                    Phone:'8981103780',
                    Email:'rozaStalin@cboard.com'}"/>
    <div class="slds-p-around_medium">
        <lightning:input name="First Name" type="text" label = "First Name" value="{!v.con.FirstName}"/>
        <lightning:input name="Last Name" type="text" label = "Last Name" value="{!v.con.LastName}"/>
        <lightning:input name="Phone" type="phone" label = "Phone" value="{!v.con.Phone}"/>
        <lightning:input name="Email" type="email" label = "Email" value="{!v.con.Email}"/><br/><br/>
        <lightning:button label="Quick Create Contact" variant="Brand" onclick="{!c.doSave}"/>
    </div>
</aura:component>

Controller - 

public class cboard_seeContacts {
    
    @AuraEnabled
    public static List<Contact> ContactList(string accId){
        return [Select Id, FirstName,LastName from Contact where AccountId =:accId];
    }
    
    @AuraEnabled
    public static Contact createContact(Contact c, Id AccountId){
        c.AccountId=AccountId;
        insert c;
        return c;
    }
}

JS-  
({
    doSave : function(component, event, helper) {
        var action = component.get('c.createContact');
        action.setParam({
            c : component.get('v.Con'),
            AccountId : component.get('v.accId')
        });
        action.setCallBack(this, function(response){
            var state= response.getState();
            if(state === 'SUCCESS' || state ==='DRAFT'){
                var reposneValue = response.getReturnvalue();
            }
        },'ALL');
        $A.enqueueAction(action);
    }
})


I am unable to figure out why the inputs and button is not working. Any help will be appreciated.