gistfile1.txt

  toScreenTwo = async () => {
    const { isLoggedIn, user} = this.state;
    try {
      if (!isLoggedIn) {                 
        const response = await http.post('/v1/signup/user', {
          user,
        })
        for (var value in response.data) {
          await this.state.tableData2.push(value);
        }
        console.log('response', this.state.tableData2);
      }
      
     

      await this.setState({
        modalVisible: false,
        friendsModalVisible: false
      });
    } catch(err) {
      console.log("error ", err);
    }
    
  }

Just change your for loop to below :

for (var key in response.data) {
          await this.state.tableData2.push(response.data[key]);
        }