Congress Lookup Utility

public without sharing class CongressLookupUtility {

    public kweos__EOCS_Data__c c {get;set;}
    public kweos__EOCS_Data__c processedc {get;set;}
    public String cDistrict {get;set;}
    public List<Contact> kwcontacts {get;set;}

    public CongressLookupUtility() {
        c = new kweos__EOCS_Data__c();
    }

    public void getDistrictInfo () {
    c.kwac__KW_Error_Code__c = '';
    c.kwac__Latitude__c = NULL;
    c.kwac__Longitude__c = NULL;
    c.kwac__ZTDM_Expiry_Date__c = NULL;
    c.kwac__KWD_Last_Processed_DT__c  = NULL;
    c.kwac__Zip_4__c = NULL;
    c.kwac__KW_USHouseDistrict__c = '';
    c.kwac__KW_USHouseDesc__c = '';

	kwzd.KWD_SingleRecordUpdate kws;
	String sErrorMessage = '';
    try {
        kws = new kwzd.KWD_SingleRecordUpdate();
        kws.executeupdate('kweos__EOCS_Data__c', c);
    }
    Catch (Exception Ex) {
        system.debug(Ex);
        sErrorMessage = Ex.getmessage();
    }
    if (kws.showerrors) {
        system.debug(kws.dbError);
        sErrorMessage = kws.dbError;
        cDistrict = sErrorMessage;
    }
    else {
        processedc = (kweos__EOCS_Data__c)kws.soProcessed;
        cDistrict = json.serializePretty(processedc);
    }
}

public void getElectedOfficialsbyKWID(String sIds) {
    List<String> kwids = sids.split(';');
    kwcontacts = [Select Id, FirstName, LastName, Account.Name, kw__KW_Category__c, kw__KnowWhoIdNew__c,
    Account.kw__KnowWhoIdNew__c 
    FROM Contact 
    WHERE Account.kw__KnowWhoIdNew__c IN :kwids
    AND kw__KW_Category__c = 'Fed Legislator'];
}
    //global KWD_ZDM_Input knowwhoResponse;
    
    
}

REST Endpoint

@RestResource(urlMapping='/congresslookup')
global class CongressLookup_REST {
    @HttpGet
    global static String getDistrictInfo() {
        system.debug(RestContext.request.params);
        Map<String, String> params = RestContext.request.params;
        CongressLookupUtility clutility = new CongressLookupUtility();
        clutility.c.kweos__Address1__c = params.get('street');
        clutility.c.kweos__City__c = params.get('city');
        clutility.c.kweos__State__c = params.get('state');
        clutility.c.kweos__Postal_Code__c = params.get('zip');
        clutility.getDistrictInfo();

        if (params.get('officials') != NULL && params.get('officials') == '1') {
            clutility.getElectedOfficialsbyKWID(clutility.processedc.kwac__Elected_Officials_Ids__c);
            //RestContext.response.responseBody = Blob.valueOf(json.serializePretty(clutility.kwcontacts));
            return json.serializePretty(clutility.kwcontacts);
        }

        else {
            return clutility.cDistrict;
            //RestContext.response.responseBody = Blob.valueOf(clutility.cDistrict);
            
        }
    }
}