A simple way to store secrets, such as API tokens, in Observable notebooks. This notebook provides an input called \`secret\`, which works like: \`secret('key', options from \` \`@jashkenas/inputs\`\`)\` The form stores its last input value in \`localStorage\` under the provided key. For example, this input called \`apiKey\` stores its value as \`localStorage.apiKey\`. This way, it retains a secret val">