How can i write to a specific cell in a Google sheets range?

I am creating a discord bot and would like to write to a specific cell in Google sheets. With this code i am able to post the userInput into the embed when the command is executed on discord.

However the code is returning an error : Missing range, and is not writing in google sheets.

Essentially i want the user to use the command “/checkbl steamidhere”. “steamidhere” would be whatever the userInput is. Write that user input into the Google sheets cell H1.

This is my code I am currently using:

async function readBlacklist() {
    const spreadsheetId = "myspreadsheetID";
    const sheetName = "BOTDATA";
    const cells = ["H1"];
    const valueInputOption = 'USER_ENTERED';
    const ranges = cells.map((c) => `'${sheetName}'!${c}`);
    const sheets = google.sheets({ version: "v4", auth });
    try {
      const response = await sheets.spreadsheets.values.update({ spreadsheetId, ranges, valueInputOption });
     const rows = response.data.valueRanges.reduce((o, { values = [[""]] }, i) => ((o[cells[i]] = values[0][0]), o), {});
      return rows;
    } catch (error) {
        console.log(`There was an error: ${error}`)
    }
  }

  (async()=>{
const write = await readBlacklist(['test']);
console.log(write);
if (interaction.commandName === 'checkbl') {
    const userInput = interaction.options.get('steamid').value;
    const bl = new EmbedBuilder()
    .setTitle('Blacklist Checker')
    .setDescription(`${userInput}`)
    .setColor('Red')
    .setThumbnail('https://i.imgur.com/9GKhYQf.png')
    .setFooter({text: 'DroneOS', iconURL: 'https://i.imgur.com/9GKhYQf.png'})
    .setTimestamp()

    interaction.reply({ embeds: [bl]});

}

})()