- members_full -+
                |
                + --- abnGMbre --- +
                                   |
                                   + --- mother : 'His mom'
                                   + --- Father:  'daddy'

- members_header+
                |
                + ---- abnGMbre -- +
                                   |
                                   + ---- fullname: 'john Doe'
                                   + ---- pictURL: 'path to his profile pic'

const member:any = data;
        var fullRef : admin.firestore.DocumentReference;
        var headRef : admin.firestore.DocumentReference;
        var countRef: admin.firestore.DocumentReference;
        var createNewMember = false;
        if(member.uid!==undefined && member.uid!==null){ // update
          fullRef  = fsDB.collection('members_full').doc(member.uid);
          headRef  = fsDB.collection('members_header').doc(member.uid);
        } else {
          fullRef  = fsDB.collection('members_full').doc();
          headRef  = fsDB.collection('members_header').doc(fullRef.id);
          countRef = fsDB.collection('counters').doc('count_members');
          createNewMember = true;
        }

        return fsDB.runTransaction(t => {
          return t.get(fullRef).then(doc => {
            if(!createNewMember && !doc.exists){ // Error, cannot update if not yet exists
              t.update(countRef, {count: admin.firestore.FieldValue.increment(1)}); // Do not consider this line... Still to fix
            }
           // Increment number of members if creation
            if(createNewMember){
              t.update(countRef, {members_count: admin.firestore.FieldValue.increment(1)});
            }

            // Update/create full details
            t.set(fullRef, {
              surname     : member.surname     ,
              firstName   : member.firstName   ,
              birthDate   : member.birthDate   ,
              birthPlace  : member.birthPlace  ,
              email       : member.email       ,
              phone       : member.phone       ,
              occupation  : member.occupation  ,
              father      : member.father      ,
              mother      : member.mother      ,
              spouse      : member.spouse      ,
              children    : member.children    ,
              addressHome : member.addressHome ,
              addressLocal: member.addressLocal,
              contactHome : member.contactHome ,
              contactLocal: member.contactLocal,
              comment     : member.comment     ,
              regDate     : member.regDate     ,
            });
            // Update/create header details
            t.set(headRef, {
              fullName    : member.fullName    ,
              gender      : member.gender      ,
              active      : member.active      ,
              picURL      : member.picURL      ,
            });

          }).then(() => {
            return { status : STATUS.ok , pointer:'then t.get'}
          }).catch(err => {
            return {
              status: STATUS.fail,
              message: err.message,
              error: err,
              pointer: 't.get'
            }
          });
        }).then(() => {
          return { status : STATUS.ok, pointer: 'then run transact' }
        }).catch(error =>{
          return {
            status: STATUS.fail,
            message: error.message,
            debug:  'run transaction err',
            error: error
          }
        });